I have bought 2 nitro's off of Ebay- HPI Nitro MT and the Savage I just got.
No problems whatsoever.

Before that I bought probably 8 vintage electric RC's with no problem.

Ebay is good, you just have to be on your highest level of alert. If I smell
one word or something remotely catching my attention, I will not buy.

Unless it is a low dollar purchase or something new, I won't buy it unless
the member has 100% feedback with at least 10-20 feedback and we
have emailed back and forth and I am comfortable.